Sometimes due to sigblockmask inheritance cgroupd can inherit SIGTERM blocked. That will lead cgroupd ignoring SIGTERM from stop_cgroupd() and CRIU will get stuck due to waiting for never-stopping cgroupd.
I see this happening in lxc-checkpoint, also saw this in OpenVZ jenkins on cgroup_inotify00 test.
avagin
commented
1 week ago
Sometimes due to sigblockmask inheritance cgroupd can inherit SIGTERM blocked. That will lead cgroupd ignoring SIGTERM from stop_cgroupd() and CRIU will get stuck due to waiting for never-stopping cgroupd.
I see this happening in lxc-checkpoint, also saw this in OpenVZ jenkins on cgroup_inotify00 test.